linux-kernel - [tip:x86/asm] x86/asm/entry/64: Merge 32-bit execve stubs with x32 ones, as they are identical

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Message-ID: <tip-ac7f5dfb0348a33b2ea92a0c477103c4db45ad4e@git.kernel.org>
Date:	Wed, 22 Apr 2015 07:11:28 -0700
From:	tip-bot for Denys Vlasenko <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	keescook@...omium.org, fweisbec@...il.com, ast@...mgrid.com,
	tglx@...utronix.de, dvlasenk@...hat.com, brgerst@...il.com,
	linux-kernel@...r.kernel.org, wad@...omium.org,
	luto@...capital.net, rostedt@...dmis.org, mingo@...nel.org,
	torvalds@...ux-foundation.org, oleg@...hat.com, bp@...en8.de,
	hpa@...or.com
Subject: [tip:x86/asm] x86/asm/entry/64:
  Merge 32-bit execve stubs with x32 ones, as they are identical

Commit-ID:  ac7f5dfb0348a33b2ea92a0c477103c4db45ad4e
Gitweb:     http://git.kernel.org/tip/ac7f5dfb0348a33b2ea92a0c477103c4db45ad4e
Author:     Denys Vlasenko <dvlasenk@...hat.com>
AuthorDate: Tue, 21 Apr 2015 18:03:13 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 22 Apr 2015 08:41:44 +0200

x86/asm/entry/64: Merge 32-bit execve stubs with x32 ones, as they are identical

Run-tested.

Suggested-by: Brian Gerst <brgerst@...il.com>
Signed-off-by: Denys Vlasenko <dvlasenk@...hat.com>
Cc: Alexei Starovoitov <ast@...mgrid.com>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Kees Cook <keescook@...omium.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Will Drewry <wad@...omium.org>
Link: http://lkml.kernel.org/r/1429632194-13445-1-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/entry_64.S | 23 +++++------------------
 1 file changed, 5 insertions(+), 18 deletions(-)

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 3c78a15..e952f6b 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -525,40 +525,27 @@ GLOBAL(stub_execveat)
 	CFI_ENDPROC
 END(stub_execveat)
 
-#ifdef CONFIG_X86_X32_ABI
+#if defined(CONFIG_X86_X32_ABI) || defined(CONFIG_IA32_EMULATION)
 	.align	8
 GLOBAL(stub_x32_execve)
+GLOBAL(stub32_execve)
 	CFI_STARTPROC
 	DEFAULT_FRAME 0, 8
 	call	compat_sys_execve
 	jmp	return_from_execve
 	CFI_ENDPROC
+END(stub32_execve)
 END(stub_x32_execve)
 	.align	8
 GLOBAL(stub_x32_execveat)
-	CFI_STARTPROC
-	DEFAULT_FRAME 0, 8
-	call	compat_sys_execveat
-	jmp	return_from_execve
-	CFI_ENDPROC
-END(stub_x32_execveat)
-#endif
-
-#ifdef CONFIG_IA32_EMULATION
-	.align	8
-GLOBAL(stub32_execve)
-	CFI_STARTPROC
-	call	compat_sys_execve
-	jmp	return_from_execve
-	CFI_ENDPROC
-END(stub32_execve)
-	.align	8
 GLOBAL(stub32_execveat)
 	CFI_STARTPROC
+	DEFAULT_FRAME 0, 8
 	call	compat_sys_execveat
 	jmp	return_from_execve
 	CFI_ENDPROC
 END(stub32_execveat)
+END(stub_x32_execveat)
 #endif
 
 /*
--
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